#include "def.h"

// 定义常量 PI
#define PI 3.1415926
// 定义一个二维数组用于存储余弦值
double cos_table[8][8];

/*
初始化余弦表的函数
本函数生成一个 8x8 的余弦值表并打印生成信息。
*/
void cos_table_init()
{
	int i, j;

	printf("Generating cos table......\n");
	for (i = 0; i < 8; i++)
	{
		for (j = 0; j < 8; j++)
		{
			cos_table[i][j] = cos((2 * j + 1) * i * PI / 16);
		}
	}
}

// 标准哈夫曼编码长度表
int STD_HUFFMAN_LEN[2][2][17] = {
	{{0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0},
	 {0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7D}},
	{{0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
	 {0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77}}};

// 标准哈夫曼编码表
int STD_HUFFMAN_CODE[2][2][256] = {
	{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11},
	 {0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
	  0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
	  0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
	  0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
	  0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
	  0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
	  0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
	  0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
	  0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
	  0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
	  0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
	  0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
	  0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
	  0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
	  0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
	  0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
	  0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
	  0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
	  0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
	  0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
	  0xf9, 0xfa}},
	{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11},
	 {0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
	  0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
	  0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
	  0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
	  0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
	  0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
	  0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
	  0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
	  0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
	  0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
	  0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
	  0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
	  0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
	  0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
	  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
	  0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
	  0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
	  0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
	  0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
	  0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
	  0xf9, 0xfa}}};
